| 摘要 |
PROBLEM TO BE SOLVED: To provide toner, a full-color toner kit, a process cartridge and an image forming apparatus free from failure in the color balance as a full-color toner with time or from contamination on the base caused by a black toner with time. SOLUTION: The toner comprises at least a yellow toner, magenta toner, cyan toner and black toner, wherein the black toner is a spheric toner containing iron oxide and satisfies the relational expression (1): ¾Q color¾-¾Qblack¾>5. In the expression, Qcolor represents the average of a triboelectric charge amount of the color toners, and Qblack represents the triboelectric charge amount of the black toner. COPYRIGHT: (C)2005,JPO&NCIPI
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